Chinese Standard: GB/T 1149.1-2008

Internal combustion engines—Piston rings—Part 1:General specifications

IDT  ISO 6621-4:2003

全国内燃机标准化技术委员会(SAC/TC 177)

GB/T 1149的本部分规定了活塞环的通用特征（单独的尺寸特征在相应的国家标准中规定）、代号、标记和标志。
本部分适用于气缸直径小于或等于200 mm的往复式内燃机和压缩机的活塞环。

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